Detachable extension clamp



May 4 1926.

' B. w. SEELY DETACHABLE EXTENSION CLAMP Filed August-26, 1924 2 she t-Sheet 1 May 4 1926.

B. W. SEELY DETACHABLE EXTENS ION CLAMP 2 Sheets-Sheet 2 Filed August26, 1924 Patented May 4, 1926;

UNITED STATES- 1,583,611 PATENT OFFICE.

' BENJAMIN w. SEELY, or PENSACOLA, rnonxna.

DETACHABLE EXTENSION CLAMP.

Application filed August 26, 1924. Serial 1%. 734,308.

To all whom it may concern:

able others skilled in the art to which appertains to make and use thesame;

This invention relates to carpenters clamps, and has for its primaryobject the provlsion of a novel devlce of this character which shall beadapted to hold in assembled relation units of work varying in widthfrom a fraction of an inch to several feet, which shall be simple andinexpensive to manufacture, and which may be readily taken apart so thatthe parts thereof may be compactly arranged for storage.

With the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts hereinafter 'fullydescribed and ,clalmed, and illustrated in the accompanying drawings,

- wherein Figure 1 is a view in side elevation of the clamp applied .toa comparatively narrow v Figure 2 is abottom plan view of; the clamp,

Figure 3 is a'view in side elevation of the clamp applied toacomparatively wide unit of work,

Figure 4 1s a detail sectional view taken on the plane indicated by theline 44 of Figure '1, Figure 5 is a detail sectional view taken on theplane indicated by the line 5-5 of Figure 1, I

Figure 16 is a detail sectional view taken on the plane indicated by theline 6-6 of Figure 1,

Figure 7 is a view in side elevation of the clamp applied to a unit ofwork with the bracket and pressure screw removed,

Figure 8 is a detail sectional view, illus tratinga slightly modifiedform of the intermediate bar section, and -F-igure 9 is a detail tratingthe formation of the openings in the aws and bracket of the clamp.

Referring to the drawings by reference numerals, 1 designates the bar ofmy 1m.

proved clamp. The bar is of sectional sectional view illusformation, anditembodies terminal sections 2 and 3 and an intermediate section 4. The

sections 2, 3 and 4 areadjustably connected together so as to permit thelength of the bar 1 to be increased or decreased, they may be of anydesired length, and they'may be of the same or of different lengths. Theterminal sections 2 and 3 areof hollow U-shapcd formation in crosssection, and the intermediate section 4 is of solid U-shaped formationin cross section. The intermediate section 4 has a snug sliding 'fitwithin the terminal sections 2 and 3 to prevent the sections from havingany relative lateral or.

twisting movements. These parts are pro vided with longitudinal rows ofopenmgs 2 3 and 4, respectively, to permit them to be secured in therequired adjustedvposition by pins 5. Jaws 7 and 8 are slidably mountedupon the terminal sections 2 and 3, respectively, to permit them to berelatively adjusted. The jaws 7 and 8 are provided with rows of openings'2" and. 8, respectively. These rows of openings are in aline- .mentw1th.the rows of openin s 2" and 3.

Thejaws 7 and 8 are secured in adjusted position by pins'9/passing'through registering openings in the jaws and terminalsections. Thepins 5 pass through registering openings in the terminalsections 2 and 3 and'the intermediate section 4. The pins 9 are securedto their respective jaws by flexible elements 10 so as to prevent themfrom being misplaced or lost. A" bracket 11 is slidably mounted upon theterminal section 3 outwardly'beyond the jaw 8- for adjustment withrespect to this jaw. The bracket 11 is provided with a row ofopenings-ll arranged in alinement with the row of openingsfi, and it issecured in adjusted position by a pin 12 passing through a registeringpair of these openings. Thispinis secured to the bracket. ll by aflexible element 13 so as to prevent its misplacement or loss. Apressure screw 14 has threaded connection with the bracket 11, and it isprovided at its inner end with a swivelled head 15 for contact with thejaw 8,, and at its outer end with'a hand wheel 16.

As the sections 2, 3 and4 of the bar 1 are connected together forrelative endwise adjustment, as the jaws 7 and 8 are mounted upon thebar for relative adjustment, and as the bracket 11 is mounted .upon thebar for adjustment with respect to the jaw 8, it should be apparent thatthe clamp may be the distance between these parts is slightly greaterthan the distance between opposite edges or sides of --the unit of work,and the jaw 7 secured in adjusted position by its pin- 9, the clamp isapplied to the unit of work with the jaw 7 in contact with one edge orside thereof. The pressure screw 1 11 is then turned up until the partsof the work are under the desired pressure, after which the jaw 8 issecured against movement on the'bar 1 by its pin 9. If desired, thebracket 11 and pressure screw 14 may now be removed and used inconnection with 1 is shown in Figure 8, and this section 4:.

differs from the section 4 in that it is of hol- .low U-shapedformation. In practice, the clamp may be equipped with an intermediatebar section of solid U-shaped formation in cross section, as clearlyshown in Figures 4, 5 and 6, or with the hollow U-shaped inter mediatesection shown in Figure 8.

In Figure 9 the formation of the bar receiving opening 7 in the jaws 7is illustrated. By reference to this figure, it will be seen that theend walls 7 of the opening are inclined in opposite directions in orderto permit the jaw to be readily moved along the bar 1., The openings inthe jaw 8 and bracket 11 are similar to the opening 7.

It should be understood that the drawings are merely illustrative and donot pretend to give exact proportions. Furthermore, the said drawingsare illustrative of a preferred construction, it being my expectationthat various changes and modifications may be made without departingfrom the spirit and scope of my invention.

\Vhat is claimed is 1 v 1. A clamp comprising a bar embodying terminalsections of hollow U-shaped formation in cross section and anintermediate section of solid Ueshaped formation in cross section, theintermediate section-being received by the terminal sections slidably topermit the length of the bar to be varied, means adapted to secure thesections against movement with respect to each other, jaws another clampcomprising bar sections 2,: carried by the bar, a bracket carried by the3 and 4, and the jaws7 and 8.

bar,- and a pressure screw carried by the bracket.

2. A clamp comprising a bar embodying adjustably connected sections,certain of said sections being of hollow U-shaped formation in crosssection and the other section being of solid U-shaped formation in crosssection, means securing the sections in adjusted position, jaws mountedupon the bar, a bracket mounted upon the bar, and a pressure screwcarried by the bracket.

3. A clamp comprising a bar embodying adjustably associated terminal andintermediate sections of U-shape in cross section, the members of the.terminal sections being hollow to receive the intermediate section',means for securing the sections'in adjusted position, 'aws mounted onthe bar, a bracket mounte on the bar, and a pressure screw carried bythe bracke In testimony whereof I' aflix my'signature,

. BENJAMIN W. SEELY.

